Valve-actuating mechanism



Dec. 16, 1924. 1,519,722

M. E. CRANDALL VALVE ACTUATING MECHANI SM "Dems, 1924.l 1,519,122

M. E. CRANDALL VALVE ACTUATING MECHANISM Filed April 9. 1924 2 seetsheet 2 Patented Dec. 16, 1924.

MAX-E.CRANDALL. OF KING'FISI'IER, OKIJAHGMA:

vanvniie'ruiirrne- Meenemen.

Apprzcationfna April e,

To @ZZ ywhom lif-may 'conce/ivi.'

Be it known that I,lWIlifx El CRANDALL, a citizen of-fthe United States, residing' at Kingfisher, in the county of Kingfisher and `State ofv Oklahoma, have"j in'v'ented certain new and useful Improvements in Valve! actuating 'lifechanisim 'of which the following is a specification This invention 14relates toi an' improved valve actu atirip',` nieclianism'for internal couibustion enginesl and'seels; as one of its objectsl7 to lprovi'de'a mecli'anisn'r for use in connection with overheadflvalves and wherein the 'usual tappets,"push rods androclrers'will be 'eliminated:V

The inventi 'ni"'se'eis,` as a vfurther object. to provide'fa Vmechanism employing a single pull road "for opening each valve.

And the invention'seels', as a still further object, toV pr'ovidea novelguide for mounting each pullI rod.

Other andy incidentalobj'ects willfappear hereinafter.

In the drawings r Figure `-1 is "a "sectional view showing an engine equipped Awith my improved mechamsm,

Figure 2 is an enlarged detail sectional' View on' thel line f2s-:2 lof-1F igure"1,"loi king in the direction of the arrows,

Figure 3 is a detail sectional view/showing the joint betweenfthefsectionsoffthe pull rod employed,

Figure 4 is a view partly in elevation and partly in section, showing a slight modifr cation of the invention, and

Figure 5 is a view similar to Figure 4L, showing a further slight modification.

Referring now more particularly to Figures 1, 2 and 3 of the drawings, I have illustrated a conventional engine embodying a crank case 1U upon which is mounted a. cylinder 11 and journ'aled through the crank ease is a crank shaft 12 to which is attached a connecting rod 1B extending from a piston 14 slidable in the cylinder. Extending through the cylinder at its upper end is a valve cage 15 mounting a valve 16 and surrounding the valve is a spring 17 cooperating with a cap 18 for normally holding the valve closed. The usual cam shaft of the engine4 is indicated at 19. All of this structure is of conventional design and need not be further taken up in detail.

Coming now more particularly to the subject of the present invention, I employ a pull 1924"." sel-fiar Noi 705,315]

rod which may be formed as a single unit'or.r as shown in the drawings, may 'be formedof complemental sections Q() and "21. fis shown in detail in Figure 3, 'one of the sections is` formed Vwith a stud Q2 vwhile the other 'of said sections provided with a socket to ac'- coinniodate said stud and screwed througll the latter section to 'engage the stud are'set` bolts connecting tlie sections. In thus" forming the pull rod in sections, the rod may be more conveniently vinstalled and, as will be observed,f5tlie `section 2O is formed to extend freely tlirouiglia suitableopeningat 'the top of the cranltcase 10 while at itsadjacent end, Ythe 'sait section is providedwitli a laterally directed 'arm 24 to extend 'beneath the 'cam shaft 19 for enoao'ement b if one of the camstlere'ef The section L21 ofthe rodv l'olted to the crank` easel() behind the pull rod is an uil'istrtnding auglelfplate QT'agai'ns-t" whiciitli'e pull rod abnts' and. prefi-rrably, the puil rod is of the cross sectiona-lsiape showniu 'Figure' so'ftliat the plate thus limits the rod' against turning movement.' Projectingfrom-1 said platev are verticallyspaced pairs ofistuds 28 and snugly.received` between said pairs of studs to fit over the pull rod is a channel-shaped sleeve 29 cooperating with the plate to form a guide for the rod. Extending from end to end of the sleeve are side flanges 30 apertured to freely accommodate. the pairs of studs 28 and screwed upon said studs are nuts 31 securing the sleeve in position. Inter-posed between the sides of the sleeve at the longitudinal edges thereof and the plate 2T are packing strips 32 of felt or the like and, as will be seen, the nuts 31 may be adjusted from time to time for compressing said strips and taking up any wear occurring between the pull rod and the sleeve. Thus. the pull rod will, at all times, be eiiiciently supported and guided so that, as will now be seen, as the cam shaft 19 is revolved, the pull rod will function to open the valve 16. Preferably, the packing strips 32 are saturated with oil so that, at all times, the bearing surfaces of the pull rod and sleeve may be properly lubricated.

In Figure 4.- of the drawings, I have illustrated a slight modification of the invention wherein, instead of employing` a single guide for the pull rod, I employ spaced guides 34. These guides are identical with the guide previously described lwith the exception that lthe said guides are shorter. As will be observed, the angle plate of the upper guide is bolted or other- Vwise secured to the yupper end of the cylinder so that this guide will effectually serve to support thc pull rod near its up per end while the lower guide will lilcwise support the pull rod near its lower end.

In Figure 5 of the drawings, I have illust-rated a still further modification wherein fthe cam shaft as illustrated at 19 in Figure l, is eliminated, and in lieu thereof cams such as typicallyA shown at 35, are

formed ydirectly upon the crankshaft 36 of the engine. Ay guide 37 like the guida*- illustrated and described inconnection with Figure l, is employed, and slidable thro;A

the guide is a pull rod 88. The pull rod is ident-ical with the pull rod of the prefer-red construction with the exception tlm' vthe pull rod 38 is longer and is provided n a. few parts,

The invention is, of course, capable of various other modifications such, for instances, as variations in shape and cross sectional contour of the pull rod, or in tln.l

disposed to coact with the valve for openV ing,r the valve, and means for actuating szw rod. n

2. In an internal combustion engine, a crank case, a cylinder associated therewith, a valve in the head of said cylinder, a rod extending from thecrank case to coact with the valve for opening the valve, means for actuating said rod, a plate upstanding from the crank case, a sleeve fitting the rod to cooperate with said plate and form a guide for the rod, and means adjustably connecting the sleeve with said plate. y

3. In an internal combustion engine, a crank case, a cylinder associated therewith,

a valve in the head offsaid cylinder, a t

rod extending from the crank case to` cca with the valve for opening the valve, means for actuating said rod, ay plate ilpstandn` from the crank case, a sleeve fitting the rod to cooperate with said plate and form a guide for the rod, means adjustably con.- necling the sleeve with said plate, andv a packing interposed between thev sleeve and plate.

In testimony whereof I affix my signature.

MAX n. GRANDALL.y [11.5.] 

